hmmm so.. the explosion opens a rift to the mirror universe drawing in a ship alligned to the terrans... so.. if 2 of the same ships were to explode in both unvierse at the same time.. we would have a doorway back and fourth between the mirror and prime universes...

hmmm thats something I could work with at a later date.

Okay the Mirror ship that spawns is technically "Tholian" is that to stop them from shooting the Tholians or will we get more specifics on that later (captured mirror ships, terran-tholian alliance, etc?) ?

I'm only making a fuss because it was going to be a cool cameo to liven up a battle.

No; they wouldn't be okay. Any vulcan male you make with the name Spock is going to have likeness issues. I would come up with something else to be safe -- maybe a long lost descendant or family member of Spock.